Dumbbell rack



FIG. 1 is a front elevational view of a dumbbell rack showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view of a modified embodiment of the dumbbell rack shown in FIG. 1;

FIG. 7 is a top plan view thereof;

FIG. 8 is a left side elevational view thereof;

FIG. 9 is a right side elevational view thereof; and

FIG. 10 is a bottom plan view thereof. 

The ornamental design for a dumbbell rack, substantially as shown and described. 